Same problem but with ipod
Not sure this is the right place but I have the same problem using my ipad. I can use it as a remote but I can't record anything, I get the same error:
Error response from IT: code: 1005, text: Partner not authorized to do this operation.
My tivo is a Series 3. To login I have to use my tivo account login, it doesn't recognize my tivo media access key.